_:vb50944022 . _:vb50944022 . _:vb50944022 . _:vb50944022 . _:vb50944022 . _:vb50944022 "url:https://www.ncbi.nlm.nih.gov/pubmed/25758993"^^ . _:vb50944022 "A brachydactyly type A1 that has_material_basis_in heterozygous mutation in the BMPR1B gene on chromosome 4q22."^^ .